After the cold rain tonight into Friday, we will see a gradual change to snow. The change should occur from north to south beginning Friday afternoon to the north of Louisville, across the metro in the early evening, and areas south Friday night. New GFS is a few hours later with the change across the board and that's why it's snow totals are a bit less than the NAM's. System is pretty strong and as the 2nd upper vort / speed max enters the region - which effectively causes the H7 and H5 systems to close and intensify pretty much right over us, I am leaning towards a faster change over to snow due to the combined dynamic cooling and low level CAA that takes place later on Friday.
Of course that exact time of the change over will determine just how much snow falls but it still certainly appears the heaviest snowfall will be north/northeast of Louisville - with the lesser amounts the farther south you go.
Check out the latest snowfall forecast map which is basically for the late Friday - Friday night - into Saturday morning time frame.
System is still evolving some so the snow amount forecast could still change some and of course I'll have another update for you Friday morning.
Have a great night all..
Jay
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